HTML <style> tag example at PNLdev

Run
<!DOCTYPE html>
<html>
<head>
  <style>
    body {
      font-family: 'Arial', sans-serif;
      background-color: #f2f2f2;
      margin: 0;
      padding: 0;
    }

    .container {
      text-align: center;
      margin-top: 50px;
    }

    .text {
      color: #e74c3c; 
      font-size: 24px;
      font-weight: bold;
      text-decoration: underline;
    }

    .button {
      background-color: #2ecc71; 
      color: #ffffff;
      padding: 10px 20px;
      font-size: 16px;
      border: none;
      border-radius: 5px;
      cursor: pointer;
    }
  </style>
</head>
<body>

  <div class="container">
    <p class="text">This is an example of a style tag.</p>
    <button class="button" onclick="alert('Hello!')">click</button>
  </div>

</body>
</html>